Font size
WorksheetsGenetics 2
Total questions: 55
Worksheet time: 54mins
The different forms of a gene are called ---
traits
hybrids
alleles
The blending of two traits is known as ---
incomplete dominance
codominance
A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---
Codominance
Incomplete dominance
What type of inheritance pattern is shown here?
Codominance
Incomplete dominance
If you cross a black chicken with a white chicken, only black and white checkered chickens would be produced. What kind of inheritance pattern does this follow?
Incomplete dominance
Codominance
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
0%
25%
50%
100%
The hair form gene shows incomplete dominance. Straight hair (SS) is dominant, curly hair (CC) is recessive, and wavy hair (SC) is heterozygous. Mr. and Mrs. Anderson both have wavy hair (SC). What percentage of their children will also have wavy hair (SC)?
25%
50%
75%
100%
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?
25%
50%
75%
100%
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be white?
25%
50%
0%
100%
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be gray?
25%
50%
75%
100%
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross two speckled flowers.
1 red, 2 speckled, 1 blue
2 red, 2 blue
2 blue, 2 speckled
1 red, 1 speckled, 2 blue
Which of the following are genotypes for blood type B?
IA IA and IA IB
IB IB and ii
IB IB and IB i
IA IB and IA IB
In the image above, what is the percentage of the offspring has the possibility of inheriting blood type O?
0%
25%
50%
100%
In the image above, the trait for flower color is controlled by codominance. R codes for red flowers and W codes for white flowers. Which of the following correctly reports the phenotypes?
100% red flowers
50% white flowers and 50% pink flowers
50% red flowers and 50% red and white flowers
50% white flowers and 50% red flowers
Which of the following genotypes code for the blood type AB?
IA IA and IA IB
IA IB only
IA IB and IB i
ii only
In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b alleles while the other only has B alleles. Which statement is true about the brothers?
They have the same genotype and phenotype.
They have different phenotypes and genotypes.
They have the same phenotype but different genotypes.
They have the same genotype but different phenotypes.
A father has type AB blood and the mother has type O. What percentage of blood types would you expect their offspring to have?
Type A, 25%, Type B 25%, Type AB 25%, Type O 25%
Type A 50%, Type B 25%, Type AB 25%, Type O 50%
Type A blood 50%, Type B 50%, Type AB 0%, Type O Blood 0%
Type A blood 100%
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
This chart shows complete dominance. Brown eyes (B) are dominant to blue eyes (b). Person I-2 must have genotype (a) .
This chart shows complete dominance. Brown eyes (B) are dominant to blue eyes (b). Person II-2 must have genotype (a) .
This chart shows complete dominance. Brown eyes (B) are dominant to blue eyes (b). Person III-4 must have genotype (a) .
This chart shows complete dominance. Brown eyes (B) are dominant to blue eyes (b). Person III-6 must have genotype (a) .
Person II-3 is the _____ to person III-5.
aunt
cousin
father
uncle
Person I-2 is the _____ to person III-2.
aunt
cousin
grandmother
sibling
Person II-2 is the _____ to person II-5.
aunt
cousin
sister
brother
This chart shows a X-linked recessive trait, colorblindness. What is the genotype of person I-1?
XAY
XAXA
XaY
XAXa
This chart shows a X-linked recessive trait, colorblindness. What is the genotype of person II-3?
XAY
XAXA
XaY
XAXa
This chart shows an X-linked recessive trait, colorblindness. What is the genotype of person II-5?
XAX?
XAXA
XaY
XAXa
R=round, r=wrinkled
Y=yellow, y=green
How many of the offspring will be wrinkled and yellow?
(a)
R=round, r=wrinkled
Y=yellow, y=green
How many of the offspring will be heterozygous for both traits?
(a)
R=round, r=wrinkled
Y=yellow, y=green
How many of the offspring will be round and yellow?
(a)
In this cross B=bald, b=has hair and A=tall, a=short
How many of the offspring will be bald and tall?
4/16
8/16
9/16
3/16
In this cross B=bald, b=has hair and A=tall, a=short
How many of the offspring will recessive for both traits?
4/16
8/16
9/16
3/16
In this cross B=bald, b=has hair and A=tall, a=short
How many of the offspring will be bald and short?
4/16
8/16
9/16
3/16
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?
male with white eyes
female with white eyes
male with red eyes
female with red eyes
In fruit flies, eye color is a sex linked trait. Red is dominant to white. What is the sex and eye color of flies with the following genotype: X R X R ?
male with red eyes
female with red eyes
male with white eyes
female with white eyes
Look at this cross: XBXb x XBY
What proportion of the male children are colorblind?
100%
75%
50%
25%
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a male with hemophilia?
Which genotype represents a male with normal vision?
